EP 3630852 A4 20210526 - HIGH MELT STRENGTH POLYPROPYLENE WITH HIGH STIFFNESS AND CLARITY
Title (en)
HIGH MELT STRENGTH POLYPROPYLENE WITH HIGH STIFFNESS AND CLARITY
Title (de)
POLYPROPYLEN MIT HOHER SCHMELZFESTIGKEIT MIT HOHER STEIFIGKEIT UND KLARHEIT
Title (fr)
POLYPROPYLÈNE À HAUTE RÉSISTANCE À L'ÉTAT FONDU PRÉSENTANT UNE RIGIDITÉ ET UNE TRANSPARENCE ÉLEVÉES
Publication
Application
Priority
- US 201762512335 P 20170530
- EP 17180912 A 20170712
- US 2018029763 W 20180427
Abstract (en)
[origin: US2020325320A1] A polypropylene comprising within a range from 0.1 wt % to 4 wt % ethylene and/or C4 to C12 α-olefin derived units, one or more clarifiers, or both; wherein the polypropylene has a flexural modulus of at least 200 kpsi (0.05 in/min ASTM D790(A)) and an Mz/Mw of at least 4. The polypropylenes may be made by combining propylene and a comonomer with a Ziegler-Natta catalyst and at least two external electron donors, wherein the concentration of the electron donors is within a range from 1 to 100 ppm. The concentration of electron donors may be decreased to control the haze level of the polypropylene, and/or the level of comonomer derived units may be controlled to reduce the haze level of the polypropylene.
IPC 8 full level
C08L 23/14 (2006.01)
CPC (source: EP KR US)
B29C 44/50 (2013.01 - EP); B29C 44/54 (2013.01 - EP); B29C 48/0012 (2019.02 - EP US); B29C 48/0017 (2019.02 - EP); B29C 48/022 (2019.02 - US); C08F 2/38 (2013.01 - KR); C08F 10/06 (2013.01 - KR); C08F 210/06 (2013.01 - EP KR); C08J 9/04 (2013.01 - KR); C08K 5/14 (2013.01 - EP); C08L 23/0815 (2013.01 - US); C08L 23/14 (2013.01 - US); B29K 2023/12 (2013.01 - EP US); B29K 2105/0067 (2013.01 - US); C08F 2500/12 (2013.01 - KR); C08J 2323/10 (2013.01 - KR); C08L 2201/10 (2013.01 - US); C08L 2203/30 (2013.01 - US); C08L 2314/02 (2013.01 - US)
C-Set (source: EP)
Citation (search report)
- [XI] CN 1566164 A 20050119 - SINOPEC CORP [CN]
- [I] WO 2015200586 A1 20151230 - EXXONMOBIL CHEMCAL PATENTS INC [US], et al
- See also references of WO 2018222310A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 11549006 B2 20230110; US 2020325320 A1 20201015; CN 110785442 A 20200211; CN 110785442 B 20220513; EP 3630852 A1 20200408; EP 3630852 A4 20210526; KR 20190138313 A 20191212
DOCDB simple family (application)
US 201816613468 A 20180427; CN 201880041871 A 20180427; EP 18809831 A 20180427; KR 20197035192 A 20180427